package com.huanzhidadi.logaspect.aspect;

import com.alibaba.fastjson2.JSON;
import com.huanzhidadi.logaspect.annotation.Log;
import com.huanzhidadi.logaspect.model.SysOperLog;
import com.huanzhidadi.logaspect.utils.ServletUtils;
import org.apache.commons.lang3.StringUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.HandlerMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.Map;

/**
 * 操作日志记录处理
 * 
 * @author
 */
@Aspect
@Component
public class LogAspect
{
    private static final Logger log = LoggerFactory.getLogger(LogAspect.class);

    // 线程的局部变量，用于解决多线程中相同变量的访问冲突问题
    ThreadLocal<Long> startTime = new ThreadLocal<>();

    // 配置织入点 annotation方法 within类
    @Pointcut("@annotation(com.huanzhidadi.logaspect.annotation.Log) || @within(com.huanzhidadi.logaspect.annotation.Log)")
    public void logPointCut() {
    }

    @Before("logPointCut()")
    public void doBefore(JoinPoint joinPoint) {
        startTime.set(System.currentTimeMillis());
    }

    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "logPointCut()", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, Object jsonResult) {
        handleLog(joinPoint, null, jsonResult);
    }

    /**
     * 拦截异常操作
     * 
     * @param joinPoint 切点
     * @param e 异常
     */
    @AfterThrowing(value = "logPointCut()", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, Exception e) {
        handleLog(joinPoint, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, final Exception e, Object jsonResult) {
        try {
            // 获得注解
            Log controllerLog = getAnnotationLog(joinPoint);
            if (controllerLog == null) {
                return;
            }

            // *========数据库日志=========*//
            SysOperLog operLog = new SysOperLog();
            operLog.setStatus(1);
            operLog.setOperTime(new Date());
            // 返回参数
            operLog.setJsonResult(JSON.toJSONString(jsonResult));

            operLog.setOperUrl(ServletUtils.getRequest().getRequestURI());

            if (e != null) {
                operLog.setStatus(0);
                operLog.setErrorMsg(StringUtils.substring(e.toString(), 0, 2000));
            }

            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            operLog.setRequestMethod(ServletUtils.getRequest().getMethod());
            // 处理设置注解上的参数，以及入参信息
            getControllerMethodDescription(joinPoint, controllerLog, operLog);

            // 执行耗时
            Long runningTime = System.currentTimeMillis() - startTime.get();
            operLog.setRunningTime(runningTime);

            log.info("待保存日志信息：" + JSON.toJSONString(operLog));
            // 保存数据库
            //AsyncManager.me().execute(AsyncFactory.recordOper(operLog));
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("==前置通知异常==");
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        } finally {
            log.info("执行耗时：" + (System.currentTimeMillis() - startTime.get()));
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     * 
     * @param log 日志
     * @param operLog 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, Log log, SysOperLog operLog) throws Exception {
        // 设置action动作
        operLog.setBusinessType(log.businessType().ordinal());
        // 设置标题
        operLog.setTitle(log.title());
        // 获取参数的信息，传入到数据库中。
        setRequestValue(joinPoint, operLog);
    }

    /**
     * 获取请求的参数，放到log中
     * 
     * @param operLog 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, SysOperLog operLog) throws Exception {
        String requestMethod = operLog.getRequestMethod();
        if (HttpMethod.PUT.name().equals(requestMethod) || HttpMethod.POST.name().equals(requestMethod)) {
            String params = argsArrayToString(joinPoint.getArgs());
            operLog.setOperParam(StringUtils.substring(params, 0, 2000));
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>) ServletUtils.getRequest().getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            operLog.setOperParam(StringUtils.substring(paramsMap.toString(), 0, 2000));
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private Log getAnnotationLog(JoinPoint joinPoint) throws Exception {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();
        Log annotation = null;
        if (method != null) {
            annotation = method.getAnnotation(Log.class);
            // method上没有Log注解，则表示注解存在于类上
            if (annotation == null) {
                annotation = joinPoint.getTarget().getClass().getDeclaredAnnotation(Log.class);
            }
        }
        return annotation;
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                if (!isFilterObject(paramsArray[i])) {
                    Object jsonObj = JSON.toJSON(paramsArray[i]);
                    params += jsonObj.toString() + " ";
                }
            }
        }
        return params.trim();
    }

    /**
     * 判断是否需要过滤的对象。
     * 
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    public boolean isFilterObject(final Object o) {
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse;
    }
}
